Aṣṭakā-Śrāddha Vidhi and Dāna-Praśaṃsā
Observances in the Dark Fortnight and Praise of Giving
या चाप्यन्या चतुर्थी स्यात्तां च कुर्याद्विशेषतः / आसु श्राद्धं बुधः कुर्वन्सर्वस्वेनापि नित्यशः
yā cāpyanyā caturthī syāttāṃ ca kuryādviśeṣataḥ / āsu śrāddhaṃ budhaḥ kurvansarvasvenāpi nityaśaḥ
And if there is yet another, a fourth Aṣṭakā, it should be performed with special care; on these tithis the wise should offer śrāddha daily, even if it be with all they possess.